Complete shop-assembled and function-tested RMR slide for Glock 19 Gen 3 frames. Built and function-tested in our Florida shop on a Matrix Arms Alpha black stripped slide blank — lightning-cut for reduced weight and cooling, with a polished stainless barrel and full internals installed. Drop-in fit, no gunsmithing required.

Features

• Matrix Arms Alpha stripped slide blank, black finish — RMR optic cut with lightning cuts that shave weight and show off the barrel
• Installed 9mm polished stainless steel drop-in barrel — crown/flush cut
• 3CR Tactical slide completion kit pre-installed (firing pin assembly, extractor, plunger assembly, springs, recoil rod, cover plate)
• Tall co-witness polymer sights pre-installed and aligned — visible above a mounted optic
• RMR footprint optic cut for Trijicon RMR / SRO and compatible red dots (Holosun 407C, 507C, etc.) — direct-mount, no adapter plate required
• Fully assembled and function-tested in our Florida shop — no gunsmithing required
• Manufacturer Part Number: CMP-MX-ALP-G19-BLK-TS-POL

Specifications

• Caliber: 9mm
• Compatible host: Glock 19 Gen 1–3 frames — will NOT fit Gen 4 or Gen 5
• Slide: Matrix Arms Alpha, black, RMR cut with lightning cuts
• Barrel: Polished stainless steel, crown/flush cut
• Sights: Tall co-witness

Optic Mounting Hardware

• Cover plate screws: 6-32 × 1/3"
• Optic mount screws: 6-32 × 7/16"

For optic installation, use the mounting kit included with your optic (Holosun, Trijicon, Sig, Vortex, etc.) — manufacturer kits have the correct torque spec, head shape, and threadlocker. The dimensions above are for reference when sourcing a replacement cover plate or aftermarket hardware. Optic mounting hardware is not included with this slide.

Break-in and care

Lube all slide rails and contact surfaces before first use. Run approximately 200 rounds of standard 9mm ammunition during break-in before moving to duty or self-defense loads. Confirm your lower is a Glock 19 Gen 1–3 pattern before fitting.

Shop-assembled and shipped by 3CR Tactical.

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